If you have developed your own functions and compiled a "User Library" there will be a file in the <FitAll Install directory>\FFL directory named ULib00.ffl to ULib09.ffl OR ULibib00.dll to ULib09.dll depending on whether you created the FitAll user function library using Delphi or Lazarus (FreePascal Compiler).

To share your functions with a colleague or others simply give them a copy of the *.ffl or *.dll file and have them copy it to the <FitAll install directory>\FFL directory on their system.

The next time they start FitAll your functions should be available to them.